19-2208; Rev 0; 10/01
16x16 Nonblocking Video Crosspoint Switch
with I/O Buffers
General Description
Features
The MAX4355 is a 16 ✕ 16 highly integrated video
crosspoint switch matrix with input and output buffers.
This device operates from dual 3ꢀ to 5ꢀ supplies or
from a single +5ꢀ supply. Digital logic is supplied from
an independent single +2.7ꢀ to +5.5ꢀ supply. All inputs
and outputs are buffered, with all outputs able to drive
standard 75 reverse-terminated video loads.
✕
ꢀ 16 16 Nonblocking Matrix with Buffered Inputs
and Outputs
ꢀ Operates from ±±3V ±ꢀ3V or ꢁꢀ3 ꢂupplies
ꢀ Individually Programmable Output Buffer Gain
(A = ꢁ13/3 or ꢁ23/3)
3
ꢀ High-Impedance Output Disable for Wired-OR
The switch matrix configuration and output buffer gain
are programmed through an SPI™/QSPI™-compatible,
3-wire serial interface and initialized with a single
update signal. The unique serial interface operates in
two modes facilitating both fast updates and initializa-
tion. On power-up, all outputs are initialized in the dis-
abled state to avoid output conflicts in large-array
configurations.
Connections
ꢀ 0.1dB Gain Flatness to 14MHz
ꢀ -62dB CrosstalkV -110dB Isolation at 6MHz
ꢀ 0.02%/0.12° Differential Gain/Differential Phase
Error
ꢀ Low 19ꢀmW Power Consumption (0.76mW per
Superior flexibility, high integration, and space-saving
packaging make this nonblocking switch matrix ideal
for routing video signals in security and video-on-
demand systems.
Point)
Ordering Information
The MAX4355 is available in a 100-pin TQFP package
and specified over an extended -40°C to +85°C tem-
perature range.
PART
TEMP. RANGE
PIN-PACKAGE
MAX4355ECQ
-40 C to +85 C
100 TQFP
Pin Configuration appears at end of data sheet.
Applications
Security Systems
Functional Diagram
ꢀideo Routing
ꢀideo-on-Demand Systems
Typical Operating Circuit
MAX4355
IN0
IN1
A *
V
OUT0
OUT1
OUT2
OUT15
A *
V
CAMERAS
16 x 16
IN0
IN1
OUT0
OUT1
SWITCH MATRIX
MONITOR
MONITOR
A *
V
IN2
A *
V
IN15
MAX4355
POWER-ON
RESET
THERMAL
SHUTDOWN
RESET
16
256
16
DISABLE ALL OUTPUTS
V
V
CC
EE
DECODE LOGIC
LATCHES
AGND
DIN
SCLK
UPDATE
CE
IN15
OUT15
V
DD
SERIAL
INTERFACE
DGND
MONITOR
MATRIX REGISTER
96 BITS
DOUT
UPDATE REGISTER
16 BITS
AOUT
A0–A3 MODE
*A = +1V/V OR +2V/V
V
SPI and QSPI are trademarks of Motorola, Inc.
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.